India’s coal use has grown 2.2% a year since 2015, a drop from annual growth of more than 6% over the previous 10 years.

That is the conclusion of analysis of official data on coal sales, imports and power station stockpiles by Greenpeace news platform Energydesk. The slowdown appears to reflect lower consumption in the cement, iron and industrial power generation sectors.

The environmental organisation heralded it as a sign the coal boom may be over. India’s energy development path is critical to meeting national and international climate targets.

Greenpeace energy campaigner Ashish Fernandes said: “Contrary to the projections of the global coal industry, India’s demand for the carbon-heavy fuel is not skyrocketing and the country’s energy needs will do nothing to arrest coal’s global decline.

“In this context, it would make far more economic sense for India to boost investment in renewable energy rather than pursue plans for hundreds more new coal plants that could be obsolete before they’re even built.”

Narendra Modi’s government expects coal to meet the majority of India’s huge latent energy demand, underpinning industrialisation and a push for universal electricity access. According to the International Energy Agency’s 2016 figures, 244 million Indians are living without electricity.

A draft national energy policy released in June forecast 330-441GW of coal generation capacity would be needed by 2040, up from 195GW today. That goes hand-in-hand with plans to ramp up domestic mining and reduce reliance on imports. It noted, however, that falling costs and rising efficiency of renewable sources made it difficult to predict the future energy mix.

In recent years, a rush to build new coal plants has outpaced distribution and consumption. On average, power stations are only running around 60% of the time. In one of the clearest signs of a dysfunctional market, as reported by Climate Home, Rattan India’s Amravati plant is getting paid $150 million a year to sit idle.